[gtk-doc] tests: use bash instead of sh as this uses $((expression). Fixes #604798

[Stefan Kost <stefkost src gnome org>]

commit 1b4b053f9cfe9f146d6d57ddc9f59376fd3dde33
Author: Stefan Kost <ensonic users sf net>
Date:   Thu Dec 17 22:20:18 2009 +0200

    tests: use bash instead of sh as this uses $((expression). Fixes #604798
    
    sh does not support that feature.

 tests/fail.sh     |    2 +-
 tests/tools.sh.in |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/tests/fail.sh b/tests/fail.sh
index 04e8438..6e193a9 100755
--- a/tests/fail.sh
+++ b/tests/fail.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 dir=`dirname $0`
 suite="fail"
diff --git a/tests/tools.sh.in b/tests/tools.sh.in
index 17641b5..7a866b7 100644
--- a/tests/tools.sh.in
+++ b/tests/tools.sh.in
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 failed=0
 tested=0